部署在 Google Compute Engine 上时的 Hyperledger Composer 模块 local_connection.json

Question

我有一个 hyperledger composer 项目可以在本地主机上顺利运行，但我试图将它部署到 Google Cloud Compute Engine 并且无法正常工作。

该项目分为两部分：composer 网络和与网络交互的 nodejs 后端。 T

我跟随开发人员并从 Composer 站点部署到单一组织教程。

nodejs 服务器处理注册和登录逻辑并公开其余 api 以与客户端交互。这是我的代码：

index.js

//post call to register graduate on the network
app.post('/api/registerGraduate', function(req, res) {
    console.log("Creando cuenta graduado");
    var graduateRut = req.body.graduaterut;
    var cardId = req.body.cardid;
    var firstName = req.body.firstname;
    var lastName = req.body.lastname;
    var email = req.body.email;
    var phoneNumber = req.body.phonenumber;

    network.registerGraduate(cardId, graduateRut, firstName, lastName, email, phoneNumber)
      .then((response) => {
       //return error if error in response
        if (response.error != null) {
            res.json({
            error: response.error
            });
          } else {
          //else return success
          res.json({
          success: response
                });
            }
      });    
});

network.js

   registerGraduate: async function (cardId, graduateRut,firstName, lastName, email, phoneNumber) {
      try {


    //connect as admin
    businessNetworkConnection = new BusinessNetworkConnection();
    await businessNetworkConnection.connect('admin@degree');

    //get the factory for the business network
    factory = businessNetworkConnection.getBusinessNetwork().getFactory();

    //create graduate participant
    const graduate = factory.newResource(namespace, 'Graduate', graduateRut);
    graduate.firstName = firstName;
    graduate.lastName = lastName;
    graduate.email = email;
    graduate.phoneNumber = phoneNumber;


    //add graduate participant
    const participantRegistry = await businessNetworkConnection.getParticipantRegistry(namespace + '.Graduate');
    await participantRegistry.add(graduate);

    //issue identity
    const identity = await businessNetworkConnection.issueIdentity(namespace + '.Graduate#' + graduateRut, cardId);

    //import card for identity
    await importCardForIdentity(cardId, identity);

    //disconnect
    await businessNetworkConnection.disconnect('admin@degree');

    return true;
  }
  catch(err) {
    //print and return error
    console.log(err);
    var error = {};
    error.error = err.message;
    return error;
  }

},

我正在与 postman 一起测试其余的 api。我返回的错误是 "error": "Cannot find module './local_connection.json'" 但这仅在我第一次发送 post 请求时发生。第二次报错是Error: Failed to add object with ID '166438715' in collection with ID 'Participant:org.degree.ucsd.University' as the object already exists.

显然，尽管错误是将数据写入区块链，但如果我尝试获取数据，我会收到一条错误消息，指出 cardid 未找到。

那么，我错过了什么？如果它在 localhost 上工作但在 Google VM 上不工作，是身份验证吗？我该如何解决这个问题？

感谢您的帮助！

编辑！

importCardForIdentity 函数：

async function importCardForIdentity(cardName, identity) {

  //use admin connection
  adminConnection = new AdminConnection();
  businessNetworkName = 'degree';

  //declare metadata
  const metadata = {
      userName: identity.userID,
      version: 1,
      enrollmentSecret: identity.userSecret,
      businessNetwork: businessNetworkName
  };

  //get connectionProfile from json, create Idcard
  const connectionProfile = require('./local_connection.json');
  const card = new IdCard(metadata, connectionProfile);

  //import card
  await adminConnection.importCard(cardName, card);
}

Answer 1

报告的第二个错误是因为（正如您所指出的）参与者已经创建。

真正的问题是试图从您的客户端 REST API 或邮递员中找到新发行的 'graduateRut' 业务网卡 ('not found') - 在您当前的设置中它会寻找这在 $HOME/.composer 下的同一客户端上 - 这是在与您的 nodeJS 后端不同的节点上吗？

您的 ImportCardForIdentity 函数是否也像这里显示的那样？

Unable to issue identity card using Hyperledger Composer Javascript API

部署在 Google Compute Engine 上时的 Hyperledger Composer 模块 local_connection.json

Hyperledger Composer module local_connection.json when deployed on Google Compute Engine

node.js

google-compute-engine

hyperledger-composer